King City is a city in Gentry County, Missouri, United States. The population was 1,013 at the 2010 census.

John Pittsenbarger was the first European settler when he set up a tent in town in 1856. His application to name the town Petersburg was rejected because there was already a town of that name in Boone County, Missouri. According to local legend, the United States Postmaster General submitted his name. The Postmaster General at the time was Horatio King, (although the local history refers to Rufus King)[6]